Butterfish dating

21-Jul-2017 16:49

Aquaculture is the practice of raising fish or ocean plants for food or resources.

Today, many species of fish are raised in contained fresh water or ocean water environments, including salmon, catfish, tilapia, cod and others.

(6)While aquaculture is nothing new as humans have been farming fish for millennia, there have been some substantial changes in recent decades.

There is evidence of fish farming dating back to 2000 BCE in China and depictions of ornamental fish ponds in ancient Egyptian paintings.

The amount of pollution from fish farms also depends on how the fish are contained.

Open-net, or pen systems, allow for a direct exchange of water, where as “closed contentment” methods have a barrier which filters the water.

Another way aquaculture can have a negative impact is by introducing farmed species into the wild and therefore changing the biodiversity of aquatic ecosystems.

Per week, Americans eat about 3.5 ounces of seafood, which is still only half of what the USDA recommends.They are now seen as a nuisance, as they are one of the “most invasive species known and difficult to get rid of once established,” says Aaron Mc Nevin, a WWF biologist.In Lake Apoyo in Nicaragua, tilapia escaped from a fish farm and their pollution and feeding reduced the lake’s quantity of an aquatic plant called charra, which was an important source of food for the lake’s native fish populations.Like commercial farming operations on land, the density of fish in these pens necessitates certain chemicals to keep animals from getting sick and to keep things clean.The chemicals used in marine aquaculture operations such as medicines like antibiotics and vaccines, disinfectants, and substances used to prevent corrosion of equipment (cages, etc.) can also change the composition of the surrounding aquatic ecosystem.

Per week, Americans eat about 3.5 ounces of seafood, which is still only half of what the USDA recommends.They are now seen as a nuisance, as they are one of the “most invasive species known and difficult to get rid of once established,” says Aaron Mc Nevin, a WWF biologist.In Lake Apoyo in Nicaragua, tilapia escaped from a fish farm and their pollution and feeding reduced the lake’s quantity of an aquatic plant called charra, which was an important source of food for the lake’s native fish populations.Like commercial farming operations on land, the density of fish in these pens necessitates certain chemicals to keep animals from getting sick and to keep things clean.The chemicals used in marine aquaculture operations such as medicines like antibiotics and vaccines, disinfectants, and substances used to prevent corrosion of equipment (cages, etc.) can also change the composition of the surrounding aquatic ecosystem.If populations of non-native species become established they compete with native populations for resources such as food and breeding sites.